Jonathon and samantha row their canoe 26 miles downstream in 2 hours. after a picnic, they row back upstream. after 3 hours they only travel 15 miles. assuming that they canoe at a constant rate and the river's current is constant, find the speed at which jonathon and samantha can row in still water.

9 mph

Step-by-step explanation:

Given

During downstream it took 2 hr to cover 26 miles

During upstream it took 3 hr to cover 15 miles

Let v be the canoe velocity and be the stream velocity

thus

------1

and

--------2

From 1 & 2 we get

2v=18

v=9 mph

d

step-by-step explanation:

hello and welcome!

so, when we see the words "proportional" along with a table, we need to know that we're looking numbers that divide by the same thing.

looking at this table, we simply have to do a trial and error, and divide to see which numbers have the same quotient. if you look at choice a & c, they both have equal quotients for three of the numbers, with one exception, so those can't be the answer. looking at b, there is no similarity, so that can't be it. then, we see d; if you divide all the numbers in the table, you'll see that they all divide by two, which is a proportional relationship, and our answer!

also, always remember that the x will always be the number that goes into y, and somewhere behind this table, is a formula. for this specific table, the formula would be:

since our x-value is being divided by two to get the y-value. and if they were to ask for more numbers in the series, this is the formula you would use to find them.